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How would you access Object properties from within an object method? [closed]
What is the "purist" or "correct" way to access an object's properties from within an object method that is not a getter/setter method?
...
What is lexical scope?
...)
{
int x = 10;
fun();
}
Here fun can either access x in dummy1 or dummy2, or any x in any function that call fun with x declared in it.
dummy1();
will print 5,
dummy2();
will print 10.
The first one is called static because it can be deduced at compile-time, and the second is call...
UICollectionView inside a UITableViewCell — dynamic height?
...s ago. It is actually easier than you may think. Put your cells into NIBs (or storyboards) and pin them to let auto layout do all the work
Given the following structure:
TableView
TableViewCell
CollectionView
CollectionViewCell
...
Undo scaffolding in Rails
...eady run the migrations generated by the scaffold command, you have to perform a rollback first.
rake db:rollback
You can create scaffolding using:
rails generate scaffold MyFoo
(or similar), and you can destroy/undo it using
rails destroy scaffold MyFoo
That will delete all the files cre...
Cannot add or update a child row: a foreign key constraint fails
...
You're getting this error because you're trying to add/update a row to table2 that does not have a valid value for the UserID field based on the values currently stored in table1. If you post some more code I can help you diagnose the specific caus...
How to pull specific directory with git
I have a project with git, and I just want to clone or pull a specific directory, like myproject/javascript just like subversion does.
make some changes, commit and push back again.
It's possible?
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C++11 std::threads vs posix threads
Why should I prefer one or another in practice?
What are technical differences except that std::thread is a class?
4 Answ...
What's the syntax for mod in java
...
Instead of the modulo operator, which has slightly different semantics, for non-negative integers, you can use the remainder operator %. For your exact example:
if ((a % 2) == 0)
{
isEven = true;
}
else
{
isEven = false;
}
This can be simplif...
Reference: Comparing PHP's print and echo
... a simple action such as displaying the number zero. Whether you use echo or print, the same handler " ZEND_ECHO_SPEC_CONST_HANDLER" will be invoked. The handler for print does one thing before it invokes the handler for echo, it makes sure that the return value for print is 1, as follows:
ZVAL_L...
Rails: call another controller action from a controller
...use a redirect to that action :
redirect_to your_controller_action_url
More on : Rails Guide
To just render the new action :
redirect_to your_controller_action_url and return
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